Nokia Lumia 920 - How do I focus Lumia Camera?

To focus Lumia Camera, press the camera key halfway down. To focus on a specific object, tap the object on the screen. When the focus ring blinks, it means that the camera is trying to focus. If the focus ring disappears it means that the camera couldn’t find focus. You can still take photos, but subjects that are closer than 10 metres will be blurry.